Tellurian



April 28, 19 1.

J. T. WISE TELLURIAN Filed Dec. 20. 1928 Patented Apr. 28, 1931 UNETEE STTES TELLURIAN' Application filed December 20, 1928.

This invention relates to tellurians whereby the orbital motion of the earth with relation to the sun and the effect of such motion upon the changes of the seasons may be readily seen and understood.

The general object of the invention is to provide a tellurian of a very simple form and which is so constructed that the axis of the earth at all times will point in the same general direction.

A further object is to provide a tellurian which supports the similitude or symbol of the pole star whereby it may be shownthat the north pole of the earths axis at all times points generally toward this star.

My invention is illustrated in the accompanying drawings, wherein Figure 1 is an elevation of a tellurian constructed in accordance with my invention;

Figure 2 is a fragmentary elevation of the tellurian partly in section and showing the different positions of the sun and earth.

Referring to these drawings, 10 designates the base of any suitable construction having.

a socket 11 at its upper end for the reception of a supporting rod 12 laterally ofiset at 13 so as to form a crank, this rod then extending upward at 14 through the symbol 15 of the sun, this rod above the sun being angularly bent as at 16 and supporting upon it at suitable distances the symbol 1'? of the pole star.

Mounted upon the portion 12 of the rod for rotation around this portion as upon an axis is an arm 18 extending radially outward in a horizontal plane, this arm being disposed below the crank portion 13 and at its end being formed to provide a socket 19.

Mounted upon the portion 14 of the rod which supports the sun is a second arm 20 which is supported at its inner end by means of a collar or stop 21 on the portion 14. This ill arm 20 is longitudinally slotted as at 22.

Disposed between the ends of the arm 18 and 20 is the similitude of the globe designated 23, the axis 24 of which is inclined to the axis 14 of the sun, this axis 24 at its lower end, that is, below the globe, extending vertically downward and being carried within the socket 19. The axis 24 at its upper end is Serial. No. 827,303.

coincident with the rotational axis of the earth, that is, with the globe, then is bent vertically upward and extends into the slot 22, a collar 25 being provided which supports the end of the arm 20. The provision of the slot 22 is desirable in order to permit the tree swinging movement of the globe 23 on the axis 24 at all times inasmuch as during the use of this device the axis 24 may be bent, M

and unless the slot 22 is provided the bend- Inasmuch as the arm 20 is shorter than the arm 18, it will follow that while in the position 'for the arm 18 is eccentric to the axis of the q sun, the globe Wlll be given an orbit which is eccentrlc with relation to the sun.

shown in Figure 1, the north pole will be nearer to the axis of the sun than the south pole, yet when the parts are turned to the position shown in Figure 2, the south pole will be nearer the axis of the sun than the north pole, thus exhibiting the manner in which in the summer the northern hemisphere is brought nearest to and is affected by the sun even though the earth be farther from the sun at this time and why in the winter the northern hemisphere is turned 7 away from the sun and the southern 1emi sphere receives most of the sunlight. When the parts are turned through a quarter circle from the positions shown in Figures 1 and 2, the seasons will be substantially equal.

'Of course, it will be understood that the size of this tellurian, the relative length of the arms, the dimensions of the sun and earth may bevaried without departing from the spirit of my invention as defined in the appended claims.

My figure 1 illustrates the position of the earth on June 21st and my Figure 2 on De cember 21st. In my construction, the axis of the earth is always properly inclined with relation to the axis of the sun at all times and in all positions of the globe because of the permanent angle given to the axis 2% of the globe with relation to that portion of the axis which extends downward into the socket 19.

Thus the axis 24 at its upper end has an inclination of 23 with reference to the axis of the lower end. In other tellurians known to me the axis of the earth while correct for June and December 21st will be incorrect for March and September 21st. In my construction, the axis of the earth is at all times inclined at an angle of 23 to the plane of the earths orbit so that the earth is at all times inclined correctly with relation to the y axis of the sun.

any particular material for this tellurian,

nor the particular details or" construction as these might be varied in many ways without departing from the spirit of the invention as defined in the appended claims.

I claim V 1. A tellurian comprising a base, a rod extending vertically upward from the base, then radially bent, then extending vertically upward, a globe representing the sun and mounted upon the last named portion of said rod, a lower arm mounted upon the first named vertical portion of the rod and rotatable therearound, an upper arm mounted upon the upper end of the last named vertical portion of the rod and rotatable therearound, a globe representing the earth and an axial member for said globe having a middle portion extending at an angle to the vertical and having'its ends vertically disposed and extending into and rotatable in the extremities of said arms. a p

2. A tellurian comprising a base, a rod extending vertically upward from the base, then radially bent, then extending vertically upward, a globe representing the sun and mounted upon the last named portion of said rod, a lower arm mounted upon the first named vertical portion of the rod and rotatable therearound, an upper arm mounted upon the upper end of the last named vertical portion of the rod and rotatable therearound, a globe representing the earth and an axial member for said globe having a middle portion extending at an angle to the vertical and having its ends vertically dis posed and extending into and rotatable in the above the upper arm being angularly extended and carrying the representation of the North Star, the intermediate angular portion of the rod passing through the representation of the earth in all positions pointing toward this star.

In testimony whereof I hereunto aifix my signature.

JOHN T. WVISE.

extremities of said arms, the first named rod 

